According to Scott, the Addict is the lightest production frameset and it’s noticeably light in your hands. Like wow light. Carbon racing frames in this class hover around 2 pounds plus a bag of chips. The Scott drops another 1/2 pound by removing carbon weave and all the frame bits are carbon: dropouts, cable guides.
The biggest difference is that Scott is using a high-modulus carbon, which means they can build the frame with less material.
Also build it stiff as f*ck. I rode a Scott R2 earlier this year in Greenville.
*Weighed on a postage scale.